비융착 광커넥터 접속방식에 대한 연구 = (A) study on connecting method of non-fusion splicing optical connector

다국어 초록 (Multilingual Abstract)

Practical fiber-optic cable has been manufactured along with the emergence of a worldwide FTTH market and the development of a manufacturing method that enables manufacturers to establish cable, connection, and measurement methods. In addition, the relative minimum loss value of 0.2dB/㎞ has been realized which has enabled the long distance information transfer of 100㎞～200㎞ without an optical repeater. A small increase in the loss value on the broadband, low loss and high quality transfer can cause a serious problem in the system, so connection parts that can transfer the optical signal with a low loss between the fiber optic of the optical communication and equipment are highly important. Because most FTTH transfer is made through an indoor or underground path, so it doesn't cause much loss. However, the optical connector which is exposed to outdoor elements such as temperature, humidity, and impacts at the end of the system will highly influence the safety of the homes depending on the quality of the products.

The optical connector in the end of a domestic FTTH uses a fusion splice to connect the end of the fiber cable and the fiber part of the end line. However, the fusion splice method requires expensive equipment to connect and requires a heat shrink sleeve and spare storage space in the fiber optic cable and it is ineffective working in the end of the FTTH.
However, a non-fusion connection method has newly emerged. A non-fusion connection method can manufacture optical connectors easily at the site without the fusion splice; also as it uses the existing fiber optic cable, it can use the fiber optic efficiently.
There are two representative non-fusion methods one is called mechanical connection inside the ferrule which is inserting the fiber optic into the ferrule inside the optical connector at the site, and the other is called the ferrule grinding method which is putting the fiber optic through the ferrule to fix it with epoxy and grinding it. In this thesis, various experiments were performed for temperature, humidity, and impact on ferrule grinding method and mechanical connection inside ferrule to find out the characteristics.

In the results, the characteristics satisfied the domestic regulations and it was determined that it can be used as an alternative of the fusion-splice method and it will not cause any communication problems. More studies on how to decrease the time of metalizing fiber optics and grinding forthe ferrule grinding method are need to be performed, also for the mechanical connection inside ferrule, more studies need to be performed to minimize the loss value which responds very sensitively to changes in temperature.

Various characteristics and data for the non-fusion splice method will be effectively used to apply the proper non-fusion splice method depending on transfer quality, work environment, and environmental change factors in the FTTH end cable completion and emergent recovery of the optical connector.

목차 (Table of Contents)

• Ⅰ.서 론 1
• 1. 연구의 배경 1
• 2. 연구의 목적 3
• Ⅱ. FTTH기술 및 시장동향 5
• 1. FTTH 기술 5
• 2. FTTH 구현방식 10
• 2.1 Home Run방식 10
• 2.2 AON 방식 11
• 2.3 PON 방식 12
• 3. FTTH 시장동향 13
• 3.1 해외 시장동향 13
• 3.2 국내 시장동향 17
• Ⅲ. 광선로 및 광커넥터 21
• 1. 광섬유 21
• 1.1 광섬유 심선 21
• 1.2 광섬유 심선의 종류 22
• 1.3 광섬유 손실 25
• 1.4 광섬유 접속 31
• 2. 광커넥터 구조 및 특성 34
• 2.1 광커넥터 종류 34
• 2.2 광커넥터 요구사항 35
• 2.3 광커넥터 특성 비교 38
• 2.4 광커넥터 규격 40
• 3. 비융착 광커넥터 접속방식 42
• 3.1 페룰 연마방식 42
• 3.2 페룰내 기계식 접속방식 43
• Ⅳ. 비융착 광커넥터접속방식에 대한 실험 및 분석 45
• 1. 실험장치 및 시험방법 45
• 2. 시료 제작 46
• 3. 실험 및 결과 48
• 3.1 페룰 단면측정 48
• 3.2 광학적 특성 실험 51
• 3.3 기계적 특성 실험 54
• 3.4 환경적 특성 실험 58
• Ⅴ. 결 론 62
• 참 고 문 헌 64
• ABSTRACT 65